Lu Mang, Zhang Zhong-zhi, Sun Shan-shan, Qiao Wei, Liu Xiao
Faculty of Chemical Science and Engineering, China University of Petroleum, Beijing 102249, China.
Huan Jing Ke Xue. 2009 Dec;30(12):3703-9.
The effects of growing tall fescue on the biodegradation of hydrocarbons was studied in laboratory scale pots. Degradation of hydrocarbons as well as microbial counts, soil fluorescein diacetate activity, catalase activity and dehydrogenase activity were determined. The results showed that, in the rhizosphere soil system, total petroleum hydrocarbons disappeared faster than that in unvegetated pots soil. After 10 weeks, 11.8% and 27.4% of spiked petroleum hydrocarbons disappeared from the bulk and rhizosphere soils respectively. Abiotic loss of petroleum hydrocarbons by evaporation was of minor significance in the test. The microbial plate counts and soil enzyme activities were significantly higher in the rhizosphere than in the bulk soil. Petroleum compounds had significant effect on fluorescein diacetate hydrolyzing activity. Vegetation resulted in significantly greater first-order decay constants compared to the unvegetated control. Oxygenated polycyclic aromatic hydrocarbons that were present in the soil were generally degraded more slowly than the parent compounds, suggesting that they were formed during the treatment or that they are more persistent. Four oxidation products of polycyclic aromatic hydrocarbons, 1-acenaphthenone, 9-fluorenone, anthraquinone, and benzfluorenone were found at significantly higher concentrations at the end of the study.
在实验室规模的花盆中研究了高羊茅生长对碳氢化合物生物降解的影响。测定了碳氢化合物的降解以及微生物数量、土壤荧光素二乙酸酯活性、过氧化氢酶活性和脱氢酶活性。结果表明，在根际土壤系统中，总石油烃的消失速度比无植被花盆土壤中的快。10周后，添加的石油烃分别有11.8%和27.4%从土体和根际土壤中消失。在试验中，石油烃通过蒸发的非生物损失意义不大。根际的微生物平板计数和土壤酶活性显著高于土体。石油化合物对荧光素二乙酸酯水解活性有显著影响。与无植被对照相比，植被导致一级衰变常数显著更大。土壤中存在的含氧多环芳烃通常比母体化合物降解得更慢，这表明它们是在处理过程中形成的，或者它们更持久。在研究结束时，发现多环芳烃的四种氧化产物，即苊烯酮、芴酮、蒽醌和苯并芴酮的浓度显著更高。
